Can random people add me on steam?

[xbox 360 fan]

http://steamcommunity.com/profiles/76561198043750263/
zero friends

[Ad Bot]

[awesomebread]

http://steamcommunity.com/id/awesomebread/

[BubbaGum]

http://steamcommunity.com/profiles/76561198053716478

[Matthew Padilla]

http://steamcommunity.com/id/CFE1
Don't ask me for money/games because these will only be rewarded from friendship and time well spent.

[psychomutt]

add me i hate everyone on my friends list
http://steamcommunity.com/id/psychomutt