...so dialers are not threat for me.
You still probably don't want criminal twits monkeying around with your OS! My niece had a service call (!) by a tech from her ISP to set up her DSL again. He thought that "someone had changed her settings." When I scanned, later, I found a dialler. No dial-up connection, so no outrageous 900 charges, but expense and inconvenience nonetheless.