Yeah, not to back to the original topic, but there's a very fine line between making observations and stereotyping people.
When you work with the public, its impossible not to notice that people with a particular background tend to behave in a similar way, or take similar actions, when those tendencies do exist.
To avoid offending anyone, lets say you work at a
DVC property and have cleaned the rooms of 100 customers from Mars, and 100 customers from Uranus. In cleaning the rooms, you found that 50 of the customers left the bathrooms in horrible shape, and at least 45 of those customers were from Mars. (for whatever reason, residents of Uranus have more respect for bathrooms)
Is it wrong to notice that, and say that customers from Mars tend to have less tidy bathroom habits than customers from Uranus? Not really, its just an observation. But when you use it to stereotype people, and assume that anyone from Mars is a slob, then its a problem.
Unfortunately, some people assume that anyone who makes an observation like the above is being offensive. At the same time, a lot of people let those observations color their perceptions of people (its almost impossible not to, at least to a certain extent).
I think the OP was mostly just relating an observation, though it did sound like he/she might have been letting that color too much of their opinions about people in general.
