I use photobucket as well. However, if you have an open or public profile, people can see your pics. I believe you can make them private.
I also have pics stored in dropbox, another free cloud storage site. I use DB a lot here recently for collabing and sending song tracks back and forth. It's pretty handy and I can access it quicker than photobucket which takes longer to load. I also can access DB on my smart phone with the app to check out the pics or the files people send.