What do you think would be worse than finding a lot of spam mails in your inbox?
Viruses! Yes, there are spam mails that really do not contain any message at all but an attachment that can have viruses. Big corporations often have filters that block these viruses before they get to you. But personal email is far more open for spammers. To avoid this, remember that if you do not recognize the sender of an email, do not open it.To protect yourself, look for services that offer filtering.