I guess it's based on fact, as I've heard corrections officers and wardens state it in interviews on television. They can't even keep all the drugs and weapons out of jails and prisons, and that's their priority. Cellphones are next on the list, and those get in on a regular basis as well. I realize there are going to be a lot of ultra-right-wing tough-on-crime types participating in this forum, but laments about the lack of security in jails pertaining to correspondence seems to be straying off topic, in my opinion. The letters got through, that's what we know. If the fact that they got through is so distressing to some people here they can write their MPs about it...