Should i trust free music sites?

Limewire Frostwire dont they all sound the same.And they say they are legal 100%, but are they telling the 100% truth.my neighbor downloaded Limewire and had to pay 100$ to remove it! Also my friends at school always say oh, do you have Frostwire? and i am proud to say NO beacause Frostwire downloads more than a free music link it downlads java and java notebook i also clicked "Download Frostwire now" and it brought me to a completly different music page.If you have Limewire and or another music site it can crash your computer!So my point is do not trust free music sites! this will be continued when i find out more