Laws that prohibit smoking in the workplace are a floor, not a ceiling. You are free to ban e-cigarettes in your workplace, and should consider doing so.
Before you dismiss an employee’s request for a religious accommodation as silly or outrageous, stop, think, and decide whether the expense or difficultly in making the accommodating exceeds the cost and aggravation of defending a possible discrimination lawsuit.
Perhaps one solution to this crisis is for Congress to engage in some simple oversight over the agencies that enforce our various laws, including the EEOC. $751,942.48 in taxpayer money is a costly investment to chase a fool's errand.
If you have active matters with any federal agencies, expect for them to be on hold. Please remember that while the EEOC and other agencies might be temporarily out of business, the laws that they enforce are not.
Employees have an absolute right to discuss with each other how much they make. It is illegal to have a policy that prohibits wage discussions, or to fire an employee for engaging in such discussions.