Nope

I have never done it, most of them are just ploys to get your details and then they flood you with spam.

When I want to sign up for something (I don't enter contests) I use my gmail account and keep my main one for stuff I want to see. I still get spam though.

I have lots of emails addresses. I use gmail. One for contests, one for all online purchases, one for forums and community boards and newsletters. One for personal use for family and one for guild members to contact me. I have them all set to be sent to one email address so I don't have to check each one. I can tell by the address which ones I need to read first or check right away. I don't give my correct phone number for contests. An email will be sent if the number is wrong asking you to contact who ever. And the contests that ask for phone number are the ones one that will have sponsors contact you trying to sell something. They don't need the phone number to let you know you won.

I don't enter contests online as that is a way they can get your personal information name, address, phone and email.

Nope, it's not safe and I don't want my inbox cluttered with a bunch of spam.

Winning is something that don't matter to me. Win or not it is a fun thing to join in the fun with others doing the same. Everyone is a winner just for entering.