Dear sir/madam
I am a long-time customer in RadioShack outlets, and I applaud the high quality of your products and, for the most part, the helpfulness of your staff. However, I am also a fan of cycling, and have to say that I find myself in disagreement with your companies' continued involvement with Lance Armstrong.
I believe that both his presence in a RadioShack sponsored cycling team, and his involvement in commercial advertisements for your company tarnish your image quite gravely in the eyes of the public, and also in my own eyes. His questionable ethics and propensity for cheating are not something that should be synonymous, as I believe they now are, with such a fine company as yours.
Regrettably, the conclusion I take from this partnership is one that forces me to cease my long-time loyalty to the brand. I will therefore take my patronage of your outlets elsewhere indefinitely.
Yours faithfully,