No, pissin on a toilet seat in a public men's room is selfish and inconsiderate. Disabling DRLs is a choice we all have and hopefully, most of the people who choose to opt for that choice are bright enough (pun intended) to turn their lights on in situations where lights should actually be used.
People are a lot more likely to forget to turn their headlights on when necessary if they DO have DRLs, but that's just my opinion.
True about PA law.. I've driven in PA plenty of times and have seen that sign several times.