That's a good practice ( ) to check for outstanding posts.
I usually start from the really first post of the member and you can find really strange things from the time when the member was a newbie, usually there are posts with different language, before it changes to english speaking one-liners...
And if you find some longer posts between those one-liners, now those worth a check. So basically you don't need to read thru all the posts of a member, just check those that are different. You'll see that those posts are usually a catch, so you can be more effective.
But everyone has his/her own know-how for this job I guess