It takes two sides to tango. If you examine the emails within the Smithsonian on the Sternberg matter, you will discover who would be the source of the "food fights" that you fear. In the example of Guillermo Gonzalez from Iowa State. The controversy was started those seeking to expel any mention of ID and was not a result of any proselytizing.
That doesn't answer the question. The question is, is the tango going to get destructive?
But of course that doesn’t address the fact the it is a lie to say anyone was fired for their beliefs. You can’t be fired if you don’t have a paying job, and there is no particular law against shunning someone you think is dishonest.
There is no particular reason why a university cannot refuse tenure to someone who is likely to be an embarrassment in the future.
Now if you want to do an honest survey of the effects on one’s career of advocating ID, take a good look at the careers of those who have signed the Discovery Institute’s petition. There are quite a few hundred signers, enough for a good statistical sample.
Check this post for what really happened to Gonzalez. He wasn't railroaded, he was a failure who pulled the ID version of the race card when he failed.