I use a variety of streams and a pre loaded Kodi box. Malware is hidden in all types of downloads and football sites are no better or worse than any.
Back in the day, I have been hit several times with malware, but in the last five years, I have not had a serious attack. That said, I do not use online banking and never will. The reason is that I do not have confidence in the banks.
Posters who are concerned about security but want to watch streams should invest in either a Kodi box or a cheap disposable pc, tablet, laptop. It's easy, do not use the device that holds your personal info, to download.
The biggest threat to your information comes from your family and friends, not football sites. Email providers such as Yahoo get hacked. My spam box gets upto 60 spam emails everyday. I looked at it last night and there where at least 4 that contained viruses. Everyday my "Sister" sends me an email, only it is not my Sister, she had her emails hacked and we changed her account, but everyday I get at least one,a with subject headers like,"Just for you".