This problem is not new to me.
An user can have multiple interests, so he will check some items that is presented to him. For this example. Ten items of interest. So he will mark as interested in soccer, music and news. Three items that are presented in the default list by the wep app (icon+text).
Each item has a symbol associated. Like this
But now the problem. The user wants to create a new item of interest: Cycling. So, the item has no icon associated. All the other default items have a similar design (icon+text). This is not a problem when the new tag is just text, but how about the icon?
It is a very difficult and laborious task maintain the visual similarity in a hypothetic big number of icons. And the problem of delay between the tag and the new icon is another issue.
Or should I permit the update of images without concerns of design, but with a validation of the text and image associated? Or Should i use just tags like stack sites?