The prophet use to say, I can't find the hadith, I hope the brother and sisters here can enlighten us, Our prophet muhammad PBUH says, if a fellow muslim praises you, take a handful and sand and put it to the person face, for praises only belongs to God.
I don't mind praising people, but doing it where everybody can see it, is just not sincere, I like to praise people only when I meet the person in person. Otherwise praising in public (for example in forum, or in front of many people) is either a praise or being sarcastic In my most honest opinion.