How exactly does that prevent spam, vs just using other existing established verification methods like email validation? If the only goal is preventing spam, its overkill, and other web sites who also have to contend with spam don’t use it.

It’s trivial to create new accounts and emails to verify those accounts. It is not trivial to get a new phone number since virtual numbers are blocked by the verification process.

It’s a little hard to tell from your photos but it looks like your nozzle might be too close to the bed. The first layer looks thin in places and the baconing could be from the plastic being squeezed out the sides

Think about what happens to water if it’s heated above 100C… it turns into steam! The more water there is in the plastic the more steam there will be, causing the various issues like bubbling. The release of steam also means some of the heat is not being absorbed by the filament, leading to temperature issues as it exits the nozzle

I had a similar issue where it was thin in regular intervals similar to what it looks like in your pics, the issue I had was the extruder gear was clogged up on one side so it wasn’t gripping the filament and slipping until it spun around to the unclogged side and it would extrude normally again.