Yes, that's why you can click the thumbs up and thumbs down button on an answer posted by someone who has blocked you because that option is entirely disabled and you can't click on them.
If you give a thumbs down to someone who has blocked you, the next time you load up the page, the red thumb will have vanished, but the number won't have changed. If you give another thumb down to that answer at that time, the red thumb will appear again and the number will go up again, but when you come back to the page the red will be gone again and the number will go down to where it had been before.
If you are not giving a thumb down to someone who has blocked you, then it may certainly be another issue with the site.
The site is already set up this way, or at least it was up to a couple of months ago when I last tried it. The site may say that you received zero points for answering such a question, but a quick check of your point total before and after doing so should show that you still ended up with the two points you should have.
Doesn't help that "answers" that explicitly insult other members of the site are usually deleted by the system and then restored on appeal because the poster can somehow worm around the rules that say insulting other members of the site isn't allowed.
Previously the profile image was set through Yahoo Profile (http://profile.yahoo.com), however, that service is no longer active.
We’re working on getting these features back, and you will soon be able to update your profile name, picture, Yahoo nickname, and other account settings previously managed from Yahoo Profile.
We’ll provide an update here once these features become available again.
A limited number of users can still this (like myself) because we are using an older version of Y!A preferences that doesn't rely on the disabled Y! Profiles. I wonder why Y!A just doesn't make it so that everyone is using this version of preferences since it is obvious that they can't be bothered to make a replacement for Profiles within the months since it was shut down.
A few users (such as myself) can actually do this still. This is because for some reason, we are using an older version of Edit Preferences on Y!A that doesn't depend on the disabled Y! Profiles. Of course, it was the brilliant idea of Yahoo! to remove the Profiles without already having the replacement ready to go.