In Bangkok, remain aware of your surroundings

Bangkok Travel Alert: Is Thailand Safe? What You Must Know Before Traveling To Bangkok  Headlines & Global News Travel advisories range anywhere from level 2, 3 and 4.  Level 4 advisory  is from Hong Kong
Thailand Tourism: How Quickly Will It Bounce Back? MSN
Taxi driver: Bangkok bombing suspect was calm, not Thai - CNN.com I would not jump no any racial conclusion.  Thais are nuts about whitening creams, some are well educated in foreign languages
As for impact on tourism, thai corporations are painting a rosy picture NOK Air: "... arrivals, in particular from China, have not been affected at the moment ..." Bangkok Post:  Defiant tourists vow to return to Thailand despite terror threat