The thing with PCP in pills is that for whatever reason orally ingested PCP tends to make people sick.
Also, a few years ago when a bunch of pills went around with PCP in them, people didn't like them, they couldn't be passed off as ecstasy and a lot of people were getting sick. So those pills got avoided like the plague.
Other than pills going around the Ohio area, there was only one widespread case of PCP going around in ecstasy pills. It just doesn't happen so it's not something you have to worry about unless you're in Ohio.
Like Crimson, however, I've used PCP and MDMA together before. Although that one and only time I was also on LSD and later in the night smoked some marijuana. Anyways, it was one of my favorite and most insane drug experiences.