It's usually 14 bag bundles that come in wax baggies (usually blue for w/e reason) with a black colored stamp on it that comes in a small re-sealable plastic baggie that is just large enough to fit a folded up wax paper bag in there. Usually the stamp is either one or two words of something random or a picture of something random. Some of the stamps I used to get were:
Turbo, Avion, Over, Sonic, Ray Charles, one had a picture of a handicap sign on it, Caution (came in pink plastic bags, weird), Facebook, Warning, Superman ($5 bags but they wouldn't tell you that unless you knew. If you asked for 4 bags and gave them 40 bills they'd be like keep it moving and if you gave them 20 bills they'd say the same thing), BMW, KFC, Ironman, Knockout, PR, My Turn (which became Taco Bell), Versace, there was these bags called Black Mamba right next to Turbo that were definitely Fentanyl or cut with fentanyl. Then there was shit like Dirty Sprite, Steph Curry, Crossfire, 2012, and some other shit but I stopped going to that part of Kensington because it was way too hot all the time. Basically any lettered street I stopped fucking with unless it was real early in the morning
idk, I'm drawing a blank now. There were other ones but I really can't think of them atm and the stamp is kind of irrelevant anyway. They'll change the dope up from spot to spot to get people to go to different areas and spread the business around. I wound up just going to Turbo most of the time because they opened at 4am and you could shoot up right at the spot and the dope was consistently an 8, had plenty of other junkies rolling through that you could sell shit to like subs or cigs, and was like a minute walk from a major road and like a 5 minute bus ride from broad st. It was only 5 minutes because the people down there take forever to get on and off the bus because there's like 8 strollers blocking the way. the best time to cop is like 430 in the morning because the blocks are all just opening up and sometimes you could get samples. There is also less cops and less people out and about in general. The worst time to go would be between like 9pm and 4am because it's dangerous as fuck and mostly crack sales at night anyway.
So to answer your question finally, no, they are not tamper proof at all and you can easily mess with most of the bags and the dealers don't really care because it's not like they're buying it off you
the reason dealers put them in plastic baggies is so they don't get wet in the rain because the bags are usually stashed somewhere on the street like under a piece of debris or something. Unless it's a real busy block, dealers don't usually hold bags on them. And if the wax baggies get wet you are basically wasting dope.
pretty much nothing is done with the junkie's interest in mind, everything comes back to helping the dealers somehow. The only thing they'll do for junkies is be open in all types of weather (see

lastic baggies) and sometimes have a place for you to shoot up at, usually with a local guy there who sells needles and IV supplies for a dollar. Most blocks just tell you to get the fuck out of there though
fuck philly, never did anything for me and I wish I grew up in an area where weed was legal. It's easier for me to get heroin than weed, talk about some bullshit.
And everyone one is so rude in Philly. Not in like a mean way or anything, it's just like a necessity. You literally can't be nice to people or you will get taken advantage of. I'm sure it's like that in every city but Philly seems especially bad
everyone just looks either totally fucked up on drugs or pissed off and miserable because they're trying to get fucked up on drugs.
dont go to Philly and expect to make any friends or fond memories. But you can score heroin very easily, and the quality ranges from junk to amazing like anywhere, but the sheer number of options makes it more likely to be good because the competition is real and the sets aren't overly far from each other so if you don't like one batch you can just go like a minute walk away and get something else and junkies all talk because they pan handle in the same spots so word gets around.
the cops are around but they don't actually fuck with junkies as much as people think.