Smoke overrated?

[Spledge]

In addition to limiting art tubes in pre-game negotiations, have PBEMers also employed an agreement on limiting the actual number of smoke charges deployed during a game from arty?

Hypothetical:
- Some agreed to number of total arty tubes.
- Then a number of actual smoke rounds deployed during a game is agreed to also. Example, during a given game, only 6 {or another number} deployments of smoke total from arty. Direct fire and infantry deployed smoke rounds not counted.