You can, but then what? Do you judge what they say as if their perspective is the same as yours, and then conclude from that context that what they suggest could only come from an evil person. That seems to be what a lot of people do. What if they actually think what they are suggesting is the best thing for the world? How can you tell what is in their minds?

Alternately you could criticise their arguments instead of the people, and suggest an alternative.

I'm also not entirely certain that influencing public policy is something that is inherently bad. I know if I were deaf, I would like to have some influence on public policy about deafness issues.