Plus! only has the same "security flaws" as any other application which connects to the net whether it be Adobe, Office or a Torrent program for example. The fact is, that if someone has enough time to connect to someone's network, discover the programs and services they use, intercept incoming messages and replace it with their own code, they deserver to be able to send somebody a virus. All that work and what do they have to show for it? The AV software or Anti-Spyware will get rid of it almost instantly and nobody will be worse off. It's kinda like saying your plane is 100% going to be hi-jacked... It's actually a lot of work and very unlikely to happen
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