There's only a few players that I play that have serves that I can't attack. Regarding those, I'm basically blocking it back but do try to get some direction on my return. Most times, the best I can do is just get it back deep, which is usually enough to at least keep me in contention for the point. With this sort of play I'm usually able to just not let the opponent into the point. But I'm just a (newly bumped up) 3.25. So, I still make lots of totally unnecessary unforced errors. Yes, but of course, ATTACK weak serves. I'll try to remember to compile, and post here, a video of how I, a very low level player, do this ... successfully. I think the principle applies to ALL levels of play. Yes, of course, you ATTACK weak serves.