Is it a bad idea to set current user as session variable in meteor / react framework?

I am using meteor + react to develop a small app, mostly to understand the workings of react. I am currently not using any form of Flux or Redux.

During multiple instance in the app I have to check if the person using the app is logged in. I am currently doing this with a dataContainer from react-meteor-data.

import { createContainer } from 'meteor/react-meteor-data';
...
class NavigationBar extends Component {
    render () {
        return (
            <div>
                this.props.currentUser
            </div>
        )
    }
}
... 
export default createContainer(() => {
    let currentUser = Meteor.user()
    return {
        currentUser,
    };
}, NavigationBar);

While this works fine, I am starting to find it a bit annoying to have to wrap every component in which I want to check the current user. Since I have customized login and logout functions anyway I was wondering if there is anything wrong (insecure) about setting the current user in a session variable on loggin like this:

> Session.set('currentUser',Meteor.userId());

and then just setting it to null on logout?

Thx alot