I get tired of coming into a thread where someone is complaining about a paywall but can't be arsed to actually look one up and post it. Is it a great courtesy of OP includes one? Yes, definitely! Do people sometimes forget, get distracted, etc - also yes.

If a paywall bothers you enough to complain, then it should bother you enough to look up a paywall-free version, which you could then be courteous enough to post for everyone else.