No need to dismiss contrary points of view. It's clear excessive exposure to sunshine is unhealthy. It's not clear that sunscreen is safe to use. If you have to choose between the two, then yes, choose sunscreen. But there are alternatives, like wearing long sleeve shirts and long pants, and wide brimmed hats (be aware of reflective surfaces, like snow or water, that probably bounce UV rays under hats). Personally, I dislike the feeling and smell of sunscreen. I'd rather find another way to cover up or just limit outdoor exposure during high UV periods (use your parent's basement if you need to :)

I use handheld computers on a regular basis at work. When I switch back to using a laptop after spending some time using a touchscreen device, I naturally want to touch the screen to move windows, select items from the taskbar, etc. It's silly that the functionality is missing. There's no need for this to replace the mouse. Touch-display and mouse input should complement each other.

From the perspective of playing FPS: It's easier to just consider cheating as part of the game. You're invariably going to encounter someone who's better than you - whether they're cheating or legitimately great at the game. It's just part of the challenge. There are, of course, the people who use cheats to make the game pointless (ie. they become ridiculously efficient at winning) but when this happens it's usually pretty easy to see what they're doing, and kick them out.