I was glad to discover that my beard is trustworthy. I would hate to think it might turn on me during the night and ... Oops, that's not what you meant.
The funny thing is that this is so relative to the culture of the person in question. The way that people view a person with a beard is not based on logic, but I am sure there is some truth to this notion for the western culture. Other cultures would be different. Some cultures don't trust you if you don't have a beard! I have had my beard for many years (goatee+mustache) and I haven't changed, but I suspect that how it is viewed by others has. Unfortunately, I suspect that some people see any beard as suspect since they associate them with terrorists.
I was guilty of this type of assumption at one point. One of my professors in college had a (philosopher's) beard and I assumed that he was probably kind of a hippy until I talked to him a bit. That reflected on me more than him. I have since learned not to pre- judge people based on their appearance.
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"Reality is not made of if. Reality is made of is."
-Author prefers to be anonymous.