This is a bit of a double-edged sword i think, and I can see three outcomes.
1) The great unwashed who are happy to drink B/M/C are going to want to make that. Unfortunately lagers are trickier to brew than ales, and are more likely to develop flavours which will be unexpected by those used to B/M/C. They will abandon the hobby quickly, and label all homebrew as muck, citing that "I'm never trying anything other than my beloved B/M/C again", and will tell all their friends down in the pub.
2) Alternatively, you will get the 'i drink to get drunk' brigade, who are going to whack in more sugar to get the ABV up there with aftershock, leave it for 3 days in the bath tub and then complain that it tastes like muck, and has left them with the mother of all hangovers. They will also abandon the hobby quickly, although maybe not voluntarily <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

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3) A very tiny percentage will take up a new hobby, or rediscover an old hobby. Welcome aboard!