Mentioned that, peeps tend to not read entire threats lol.
As for more effort lets see
1. check in guild - noone interested
2. check friend's list - noone interested
3. bargain in guild - I'll tank next one for you on my alt if you help me do this one - noone interested or capable?
4. trade spam time - few minutes later you either have a group or you don't, if it's the latter, move on to other things, if they happen to be bank sorting, ah, then keep on spamming, if you're out of the city, try later. Got a crap group? Say sorry this won't work, bye. Try later. 10 mins tops - don't stress yourself
It will only become frustrating if you allow it to be.