We do mind. We just can't be everywhere at once so as long as you keep it on the down-low we probably won't find out.
It shouldn't be that hard to edit out the eyebrows and stuff! Just open up the model in magos' editor (aka War3ModelEditor) and scale the eyebrows to 0, or if that doesn't work, to 0.001.
eh you kinda contradicted yourself

we do mind, so goahead and do it quietly!
personally, models are rarely ever 'perfect' for your particular map situation, or sometimes you need variations (with diff weapons)
I figure if the author doesnt feel strong enough about a model to leave other contact info (something they do check LONG term, like an email, ect)
then once they are uncontactable, whats a mapper to do?
PS, id like to get all the reasons modelers/mappers dont want someone else working on their resource, long after their gone.
1. afraid they wont leave credit?
Its not like your around anyways..., or itl get you a job offer
2. afraid they will butcher the model, and leave credit, giving you a bad rap?
Same as above..., oh and its probably your 'avitars' name on the line, not your own...
3. afraid that your resource will get forgotten for their 'improved' version?
If anything with the publicity of the previous, people will more often stumble into your version. and again its not like your earning royalties on it anyways...