unless I misread the OP it said something about programming the bot to pick up on key words like "free raffle"
if its tags - that doesnt bother me but when people start using bots just to catch raffles instead of actually being active on the forums and engaging the forums - meh.
No I believe you are correct, you can be alerted for stuff with a string in it, but I don't bother since I don't care that much about free raffles, I'll see them when I log in ofc...
From the bot's menu options: (Note, I have not tried a "Phrase", just keywords like Lealana and Casascius for example. Or AUCTION etc ... But even no on that one for me, I don't need a phone buzz for that either... For me it's best for manually adding/removing any auctions I'm following so I can see bids when i'm afk etc ... Adding threads to follow can be handy ...
From bot menu:
Tracked Phrases
Add or remove phrases so you get notified when they are mentioned.