When you right-click on a block that isn't ignitable at that moment, a block update + lightning update are sent to the client. This increases the chunk updates (normal: 90 updates; holding right mouse button: 140 updates) and amount of frames per second. It does trigger a quick lightning flash (blocks around gets lighten up), but this is the frame after reverted.
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Feel free to post suggestions at http://goo.gl/7qGlN
It does seem like an issue where unnecessary packets are being sent to Minecraft servers. Maybe it can be fixed in future versions if you post a suggestion. Sorry.
Not a bug but a suggestion. Bugs only please.