Silica is one of the most common minerals on earth. Any type of stone countertop has a potentially dangerous amount of inhaled. Just use a dust mask when cutting/grinding stone or when around people who are. If anything, synthetic countertops could (but currently is not) be made to have very low levels of silica, but people should still not be breathing them in.
I wonder if inductive power transfer could be used to eliminate the need for a battery. It would only have to power the LEDs, not the motor as that could be mounted to the base. Additionally, both coils could be placed right inside of each other, and on a ferrite core.
They can round any number under 5 kilocalories to 0, and a gram of sugar has 4 kcal. Same thing with most sweetener packets, which use sugar as a filler or else there would be less then a single grain of powder per pack. Ironically, there is another fairly common filler: erythritol, which has less calories then sugar, and doesn't contribute to blood sugar, but because of how it's produced it can't be labeled natural.
I really don't know, but the next few years will sure be interesting for content moderation and anti-spam methods.
That is provided, of course that, people actually care about bots, large companies might well not, as bots drive up user counts. With increasingly more human like bots, it will be increasingly difficult to determine just how bad it is. An internet full of bots might be a conspiracy theory now (Dead internet theory), but is quickly becoming plausible.