Some people are able to tune it out, which I get.
For me, they are vastly intrusive. Seeing a big McDonalds ad inside of the blueline is annoying. And the fact our Leafs players have Oreo splashed across their helmets and not a single trace of the Leafs logo is pathetic, and simply the corporate greed world we live in. Again, just me.
EDIT: Same goes for example seeing a TD green patch on a Blue Jays jersey or the Canucks black, gold and red skate logo jersey. They stick out like sore thumbs and ruin what are beautiful looking jerseys otherwise.