So many breeds have stereo
I think almost all breeds have stereotypes linked with them.
Yes, I agree!

The ones I hear the most bad things about are Pits, Rotts, Dobermans, and even Dalmations.

Personally, my dalmation is great! So many people say they aren't dogs to have with kids. Destiny came to us from a home that had 2 children and the youngest was falling all over her and she just sat there. It was amazing. She was so tolerant of the children that I couldn't believe people said that dalmation aren't good with kids. Amy's lab/dalmation mix is the same way. I could not imagine those two (the main dals I know) attacking anybody for no reason. Oh and to this:
"Dalmatians are the dumbest dogs."
I wonder who really thinks that. My dalmation is very smart. All of my girls are. I can see them thinking half the time when I look at them. I would never think my girls are dumb, not after observing them like I have, especially my dalmation!