Agreed mate. There are a lots of reports re the difficulties involved with completely removing the toolbar, seems it is a lot harder to get rid of than it is to install.
There would be lots of unhappy Avira users all over mate, but at least they are well aware of the situation...otherwise they wouldn't be unhappy.
The best FreewareBB can do about it is make sure all
potential downloaders are made aware.
That is, of course, provided your investigation does not come up with anything malicious. Whatever happens, I know you will do what is best mate.
P.S. Some of the more reputable/popular freeware distributors who bundle the Ask Toolbar: