hell no when it's raining..you're really asking for it..
Not really. Sure raining weather is less secure regardless if one ride, drive or fly but It's all about being prepare, understanding the condition(s) and lots of common sense. When my girl and I rode to Canada 2-up, it was windy, rainy, and/or snowy most of the trip after the California/Oregon state line but no problem what so ever.
I know it's not for everyone but Plenty of riders (myself included) ride year round even when it rains. Probably explains why there are so many rain gear vendors for motorcyclists.