Usage of striptags

We're currently using striptags in a lot of places. We should check if this is safe. As the docs state:

Note that striptags doesn’t give any guarantee about its output being HTML safe, particularly with non valid HTML input. So NEVER apply the safe filter to a striptags output. If you are looking for something more robust, you can use the bleach Python library, notably its clean method.

And I found at least one place where the safe filter is applied to the striptags output.