I don't mind at all as long as their hub is relevant and provides something of value. If their hub is total 'camel chud' you can always vote their hub down, even only for entertainment value.
I don't make it a habit to drop links to my hubs for my answers unless it is highly relevant to the question and I'm just to lazy to type and I feel my hub could provide the answer to the question with more detail than just an answer by itself.
In any case someone who makes a habit of dropping irrelevant links really just sets themselves up for failure anyway. So in a sense you have to feel sorry for their desperation.
Interesting thought though! What does bother me is finding a hub with 150 words and three links to a Real Site.
Then upon further investigation, check their account and they have 346 hubs on an account that is 4 months old and you guessed it. Chock full of 150 word hubs all with the same link to the exact same Real Estate website.
These retarded jungle monkeys have no shame!
These are the people that really get my goat up.
But your right, there are plenty of spammers here and it is tending to get much worse. I think it's high time Hub admin made a few changes to make it easier to boot these prolific spam bots.