Hi Herbert,
Did you see the options for hashtags
¡
1) Messages can be tagged with new hashtags¡
Messages from members can only be tagged with existing hashtags, ¡
2) ¡ - otherwise the message is bounced
3) ¡ - new hashtags will be removed
<<<<<
I believe options 2 and 3 mean that members can only use existing hashtags, new hashtags can only be added by moderators/owners.
This would mean that any new hashtag must be requested from the group moderators, something you tried to avoid. It¡®s a bit tedious, but would help to avoid a flood of hashtags.
Maybe an additional option would help - saying messages with new hashtags will be moderated? Could be useful for groups like your¡®s where hashtags are mandatory, and option 3 wouldn¡®t work.
Kind regards
Thomas