Originally posted by Galan007
No, the Z Fighters are simply able to concentrate their blasts so they still deliver the maximum amount of damage to their opponent, without the planet being destroyed as a result.
Only in certain cases. Both Trunks and Krillin were scared of Vegeta's Final Flash and its potential impact on the Earth until he narrowed the width.
When Goku was about to Warp Kamehameha, Cell pondered on what it would do to the planet from that angle.