1) Tags are visible to anyone, so they should convey universal information, useful to everybody.
Tags that are moral judgements, such as "XXX" and "not for safe search", as they are not even defined and cannot be, by any standards, have nothing to do on sentences either. I suggest they be removed once and for all.
People can always create private lists according to their own private moral or religious standards, which are none of other people's business, and certainly not mine.

2) Tags containing the character ":" do not work if you click on them from the sentence, in order to consult the corresponding list.
The character ":" should be replaced by something else...

Tags can be very useful but certainly have to be handled thoughtfully, to avoid an evolution into chaos. I’m sure we will easily agree that the number of (different) tags used shouldn’t grow unlimited. I’d like to make a rather simple first proposal to make it easier to overview the list of tags. If possible I’d prefer all quotation tags (all tags beginning with “by”) to be filtered away and presented in a separate list. What’s your opinion on that?
Etikedoj povas esti tre utilaj, sed certe oni traktu ilin kun pripenso, por eviti evoluon en kaoson. Mi estas certa, ke ni povos facile konsenti, ke la nombro de (diversaj) uzataj etikedoj ne kresku senlime. Mi deziras fari sufiĉe simplan unuan proponon, por plifaciligi superrigardon de la etikedo-listo. Se tio eblas, mi preferas, ke ĉiuj citaj etikedoj (ĉiuj etikedoj komencantaj per “by”) estu elfiltrataj kaj prezentataj en aparta listo. Kion vi opinias pri tio?

I would really like to remove all the tags for sentence patterns. For example: SVO, -as, ます。, as ... as, 2nd Person, etc.

I don't think these tags are at all useful for most users. If certain users want to keep track of these thing for their own projects, they can use lists.