[whatsstolat]

There seems to be a lot of "city" spam. See https://mstdn.io/tags/sydney for example. Its about 80% escort ads.

[rainbowmverse]

That's not spam. That's from people on Switter. It's an instance for sex workers.

[whatsstolat]

Hashtagging dozens of cities though? These look like spam ads for the pimps.

[rainbowmverse]

You can mute switter.at if it bothers you. Click the three dots on a user's profile and you'll see the option.